<!doctype html>
<html lang="en">
	<head>
		<title>three.js webgl - draggable cubes</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				font-family: Monospace;
				background-color: #f0f0f0;
				margin: 0px;
				overflow: hidden;
			}
		</style>
	</head>
	<body>

		<script src="../build/Three.js"></script>

		<script src="js/Stats.js"></script>

		<script>

			var container, stats;
			var camera, scene, projector, renderer;
			var objects = [], plane;

			var mouse = new THREE.Vector2(),
			offset = new THREE.Vector3(),
			INTERSECTED, SELECTED;

			init();
			animate();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				scene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.z = 1000;
				scene.add( camera );

				scene.add( new THREE.AmbientLight( 0x505050 ) );

				var light = new THREE.SpotLight( 0xffffff, 1.5 );
				light.position.set( 0, 500, 2000 );
				light.castShadow = true;

				light.shadowCameraNear = 200;
				light.shadowCameraFar = camera.far;
				light.shadowCameraFov = 50;

				light.shadowBias = -0.00022;
				light.shadowDarkness = 0.5;

				light.shadowMapWidth = 1024;
				light.shadowMapHeight = 1024;

				scene.add( light );

				var geometry = new THREE.CubeGeometry( 40, 40, 40 );

				for ( var i = 0; i < 200; i ++ ) {

					var object = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { color: Math.random() * 0xffffff } ) );

					object.material.ambient = object.material.color;

					object.position.x = Math.random() * 1000 - 500;
					object.position.y = Math.random() * 600 - 300;
					object.position.z = Math.random() * 800 - 400;

					object.rotation.x = ( Math.random() * 360 ) * Math.PI / 180;
					object.rotation.y = ( Math.random() * 360 ) * Math.PI / 180;
					object.rotation.z = ( Math.random() * 360 ) * Math.PI / 180;

					object.scale.x = Math.random() * 2 + 1;
					object.scale.y = Math.random() * 2 + 1;
					object.scale.z = Math.random() * 2 + 1;

					object.castShadow = true;
					object.receiveShadow = true;

					scene.add( object );

					objects.push( object );

				}

				plane = new THREE.Mesh( new THREE.PlaneGeometry( 2000, 2000, 8, 8 ), new THREE.MeshBasicMaterial( { color: 0x000000, opacity: 0.25, transparent: true, wireframe: true } ) );
				plane.lookAt( camera.position );
				plane.visible = false;
				scene.add( plane );

				projector = new THREE.Projector();

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.sortObjects = false;
				renderer.setSize( window.innerWidth, window.innerHeight );

				renderer.shadowMapEnabled = true;
				renderer.shadowMapSoft = true;

				container.appendChild( renderer.domElement );

				var info = document.createElement( 'div' );
				info.style.position = 'absolute';
				info.style.top = '10px';
				info.style.width = '100%';
				info.style.textAlign = 'center';
				info.innerHTML = '<a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> webgl - draggable cubes';
				container.appendChild( info );

				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';
				container.appendChild( stats.domElement );

				renderer.domElement.addEventListener( 'mousemove', onDocumentMouseMove, false );
				renderer.domElement.addEventListener( 'mousedown', onDocumentMouseDown, false );
				renderer.domElement.addEventListener( 'mouseup', onDocumentMouseUp, false );

			}

			function onDocumentMouseMove( event ) {

				event.preventDefault();

				mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
				mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;

				//

				var vector = new THREE.Vector3( mouse.x, mouse.y, 0.5 );
				projector.unprojectVector( vector, camera );

				var ray = new THREE.Ray( camera.position, vector.subSelf( camera.position ).normalize() );


				if ( SELECTED ) {

					var intersects = ray.intersectObject( plane );
					SELECTED.position.copy( intersects[ 0 ].point.subSelf( offset ) );
					return;

				}


				var intersects = ray.intersectObjects( objects );

				if ( intersects.length > 0 ) {

					if ( INTERSECTED != intersects[ 0 ].object ) {

						if ( INTERSECTED ) INTERSECTED.material.color.setHex( INTERSECTED.currentHex );

						INTERSECTED = intersects[ 0 ].object;
						INTERSECTED.currentHex = INTERSECTED.material.color.getHex();

						plane.position.copy( INTERSECTED.position );

					}

					container.style.cursor = 'pointer';

				} else {

					if ( INTERSECTED ) INTERSECTED.material.color.setHex( INTERSECTED.currentHex );

					INTERSECTED = null;

					container.style.cursor = 'auto';

				}

			}

			function onDocumentMouseDown( event ) {

				event.preventDefault();

				var vector = new THREE.Vector3( mouse.x, mouse.y, 0.5 );
				projector.unprojectVector( vector, camera );

				var ray = new THREE.Ray( camera.position, vector.subSelf( camera.position ).normalize() );

				var intersects = ray.intersectObjects( objects );

				if ( intersects.length > 0 ) {

					SELECTED = intersects[ 0 ].object;

					var intersects = ray.intersectObject( plane );
					offset.copy( intersects[ 0 ].point ).subSelf( plane.position );

					container.style.cursor = 'move';

				}

			}

			function onDocumentMouseUp( event ) {

				event.preventDefault();

				if ( INTERSECTED ) {

					plane.position.copy( INTERSECTED.position );

					SELECTED = null;

				}

				container.style.cursor = 'auto';

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>
